Ared laser pointer emits a red beam of p = 1 mw power at the λ = 635 nm wavelength. what are the photon energy, the photon momentum, and the photon flux of this beam? if it illuminates a totally absorbing surface, what is the force exerted by the beam on the absorbing surface? if it illuminates a totally reflecting surface, what is the force exerted by the beam on the reflecting surface?

the answer is b, have negligible mass

wavelength divides in half and speed stays the same.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.